When you want to purchase telescopic ladder, we will be your best choice! We get CE/EN131 certificate for our ladders. Mainly, we have 3.8m,3.2m,2.9m,2.6m,2.0m ladder items. This kind telescopic ladder is the highest ladder we produce. With the material aluminum, the gross weight is just 12kgs, it is very easy for moving, using, and take a little space when storage. It extends from its closed height of 0.81m to an amazing 3.8m, also you can use the ladder in any of its 12 height increments. The unique extend and locking mechanism clicks smoothly and effortlessly into place.This ladder are suitable for working inside and out, in the office, home or site. Always read the instructions prior to first use. 1. Aluminum material A. All of our aluminum material are bought from large state-owned factory. B. All of our aluminum materila are made of aluminum ingots,never use recycle aluminum. C. Aluminum alloy code:6063/T5, 1.5mm and 1.3mm thickness 2. Plastic A. Our telescopic ladder plastic parts never break, because we improve their thoughness by special treatment. 3.Quality control A. Each telescopic ladder must past professional inspection before leaving factory. B. Each batch goods, we choose samples to pass the following test: Open telescopic ladder, then put them as platform and put 150kgs goods in the middle, after 30 hours,check extend and fold fuction. Material :aluminum alloy new plastic Thickness of aluminum :1.5mm Open size: 381x49x9.5cm Hight between steps: 27.5cm Step number :13 Top step to ground :381cm Loading capacity :150kg Packing :1pcs/carton Carton size :91.5x53.5x13.5cm G.W/carton: 12kg/carton Container: 20FC/40HQ=480/1105pcs EN131 certificate